+An **ordinal number** describes the position of an element within an ordered [Sequence](/wiki/sequence). Unlike [Cardinal Number](/wiki/cardinal_number)s, which express quantity, ordinals denote rank, such as 'first' or 'second', in a collection. They define the "place" of something in a succession.
+## See also
+- [Order](/wiki/order)
+- [Set Theory](/wiki/set_theory)
+- [Number](/wiki/number)
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